Ezekiel 36:26
Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh.

And I will put my Spirit within you - To keep the heart of flesh alive, the feeling heart still sensible, the loving heart still happy. I will put my Spirit, the great principle of light, life, and love, within you, to actuate the new spirit, and to influence the new affections and passions; that the animal spirit may not become brutish, that the mental powers become not foolish. I will put my Spirit within you, so that as the new spirit may influence the new heart, so will My Spirit influence Your new spirit, that each may have a proper mover; and then all will be pure, regular, and harmonious, when passion is influenced by reason, and reason by the Holy Ghost.